Philippines. Department of Environment and Natural Resources. Planning and Policy Studies Office. (2001). The electronic edition of environment and natural resources policy issuances (1996-2000) (Release 1.). DENR.
Chicago-viite (17. p.)Philippines. Department of Environment and Natural Resources. Planning and Policy Studies Office. The Electronic Edition of Environment and Natural Resources Policy Issuances (1996-2000). Release 1. Quezon City: DENR, 2001.
MLA-viite (9. p.)Philippines. Department of Environment and Natural Resources. Planning and Policy Studies Office. The Electronic Edition of Environment and Natural Resources Policy Issuances (1996-2000). Release 1. DENR, 2001.
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